Selena Gomez hangs out with her idol Celine Dion

Selena Gomez posed with Celine Dion before the superstar's performance at the Colosseum in Caesars Palace, Las Vegas. (Instagram)

The 23-year-old took to Snapchat to share photos of herself and three pals all wearing their fangirl Celine T-shirts at the show. (Snapchat)

The excited star posted this picture, captioned, 'How cool do we look???'. (Snapchat)

The show was Celine's last performance in her Vegas residency until May 17. (Snapchat)

Celine, 47, took to Instagram, saying: 'Thanks to my fans and the amazing Colosseum public, that night after night gave me the energy to go on and make a show that René would be proud of'. (Instagram)

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